I disagree completely. If you are giving up 400+ yards you are going to be giving up lots of points unless you are making picks in the endzone. I agree that CB's and DB's are hancuffed when it comes to WR's and TE's , but where a defense can stop drives is with the DL and LB's. If you get big, strong DL and LB's that can get the to QB and either sack, knockdown or hurry up the QB into bad throws (See Fitz on that bad pick) the defense can stop drives and give the offense a chance to win the game.
I'll bet you a dollar that the two teams in the Superbowl this year have a defense that can get off the field.